Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 18388

Hash
000000498c0bf089f7c5dc36bc3649cfd529d550df0b2fc330d2fd30637d8a61
Confirmations
23489
Time
2026-10-09 07:42:27 UTC
Median time
2026-10-09 07:33:50 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
69451e6d2cce27c7b6fdedd89fc8f8be30cc0d72fbc57a674f502c3c9f50cbb8
Previous block
0000008c5eeaf4e1c8ab97255e5a03907d7d78f5431efe08ffdeefe6f59e500f
Next block
000000d7ff16b705a5437f1f0980aa6c505789aad2487e9650138d79941fd45e

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 18388 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
235e2f4fa61b506e0093eaad47894640… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
69451e6d2cce…2c3c9f50cbb8 coinbase1250